Preparing methanol comprises obtaining a first stream of synthesis gas comprising e.g. hydrogen, adding hydrogen in the first synthesis gas stream to form second synthesis gas stream, and producing methanol from second synthesis gas stream

摘要

Preparing methanol comprises: a step (10) for obtaining a first stream of synthesis gas, where the first synthesis gas stream mainly comprises hydrogen, water, carbon monoxide and carbon dioxide; a step (14) of adding a quantity of hydrogen in the first synthesis gas stream to form a second synthesis gas stream; and a step (16) of producing methanol from the second synthesis gas stream by reaction of carbon monoxide and hydrogen gas. Preparing methanol comprises: a step (10) for obtaining a first stream of synthesis gas, where the first synthesis gas stream mainly comprises hydrogen, water, carbon monoxide and carbon dioxide; a step (14) of adding a quantity of hydrogen in the first synthesis gas stream to form a second synthesis gas stream; and a step (16) of producing methanol from the second synthesis gas stream by reaction of carbon monoxide and hydrogen gas, where the second synthesis gas stream comprises a molar fraction of carbon dioxide of greater than 15 mol.%, the amount of hydrogen is added after the step for obtaining the first synthesis gas stream and is chosen for the production of methanol from the second synthesis gas stream by reacting carbon monoxide and hydrogen and by reaction of the carbon dioxide and hydrogen.